Breather bag



J. E. MOORE Aug. 21, 1928.

BREATHER BAG 2 Sheets-Sheet Filed May 13, 1927 LI TUE UTIUTIFU Aug. 21,-192.

J. E. MOORE BREATHER BAG Filed May 13, 1927 2 Sheets-Sheet 2 s jar/24%;

f/lfo'afla Z v J Z ,A/

l ntented Aug. 21, lfi fii rrso STATES.

PATENT OFFICE.

EDEN E. MOORE, OF WRITING, INDIANA, ASSIGNOR TO STANDARD OIL COMPANY, OF

WRITING, INDIANA, A CORPORATION OF INDIANA.

BBEATHER BAG.

to improvements in "have been described in which the breather bag is provided with a, superimposed Weight which is counterpoised to a varying extent dependingupon the degree of inflation of the bag.

'lhe present invention relates more particularly to an -.i mproved form of varying counter-poise.

lhe invention will be more readily understood from the following description in conjunction with the drawings, in which:

Figure 1 is an elevation, partly in section, illustrating one form of the invention; and

Fig. 2 is a similar view of aunodified form of the invention.

Referring to the embodiment shown in Fig. 1, 10 is a breather bag which carries a superimposed weight 11 which is partly supported by cords 12, n'el'ei'ably four in number. The cords 12- are attached at 13 to a counter-poise beltl; The belt 14; is wholly or partly in the form of a broad belt of leather or webbing or other suitable flexible material. It carries weights 15, which are preferably blocks lead, said weights being distributed with respect, to the point of attachment 13 and the position of the breather bag 10 so as to enable substantially constant pressure to be maintained in said bag. As indicated in the applications re- I ferred to, it is intended that the constant pressure maintained in breather bag 10 should be of a magnitude to establish sub stantially atmospheric pressure in the vapor space of the tanks to which the breather bag is connected.

The belt 14 is continuous and is mounted on pulleys 16, said pulleys being provided with flanges 17 for the purpose of prevents ing displacement of the belt 14: therefrom. The weights 15 are of such magnitude and are located in such spaced relation with reterenee to the particular bag with which the Application filed May 13,

1927. Serial N0. 191,153.

counterpoise is to be used, that substantially uniform pressure is maintained upon the bag 10 in all degrees of inflation. The specific location of the weights 15 must be determined by actual experiment with the particular installation. In general, it has been found that with a breather bag of the type illustrated, whichis supported around its equator, the weights 15 should exert a substantially constant counterpoising effect upon the superimposed weight ll between the positions corresponding to full inflation.

and about one-third inflation of the bag, and exert a gradually decreasing counterpoising effect as the bag deflates from onethird full to empty.

The operation is as follows: Assuming the bag to be substantially fully inflated and that it is becoming deflated due to withdrawal of liquid from the tank to which it is connected or due to fall of temperature or other causes, the weights 15 are now located near the lower portion of the left hand vertical side of the belt 14. As'the bag deflates the weights 15 ascend, exerting a constant counterpoising efiect on the weight 11 until a certain degree of deflation is obtained at which it is necessary for the counterpoising eflect todecrease in order to maintain substantially uniform pressure in the vapor space of the storage system or tank. As indicated above, this degree of inflation is approximately two-thirds for the. type of bag illustrated. As deflation continues beyond this point, some of the weights 15 pass to the upper side of the upper pulley 16, no longer exerting a counterpoising ell'ect on the weight 11. When the deflation of the bag proceeds further, some of the weights 15 will proceed to the right-hand side of the pulleys. 16 and there exert a force which partly counter balances the effect of some of the counterpoising weights 15 on the left-hand side.

- As will readily be understood. by calibrating the bag in the first instance, it is possible Referring to the modified form shown in Fig. 2, the bag is designated '10, the superimposed weight 11, the cords therefor 12',-

uous and is p 'eferably supported by rollersso that the p th of the weights 15 is substantially in the shape of an inverted -L. The belt 14 may be maintained in this posi tion' by pulleys 16; preferably provided with flanges l7 and by rollers 18 arranged to provide an arcuate path 19 and a horizontal. The rollers 18 are.

supporting path 20. preferably provided with rims21 for the purpose of preventing the belt from' slipping therefrom. The rollers 18 may suitably be mounted-upon a frame 22 suitably carried by the building in which the bag is housed.

The operation is similar to that of the form shown in Fig. 1. The calibrating and arrangements of the weights 15 will be somewhat different on account of the fact thatafter passing upwardly over the arcuate part of the path 19, the weights proceed to the horizontal path 20 where they exert no force on either the bag or active portion of the counterpoise.

Although. the present invention has been described in connection with the details of specific embodiments thereof, it is not intended that such details shall be regarded as limitations upon the scope of the inven tion except in so far as included in the accompanying claims.

I claim:

1. In combination, a breather bag, a superimposed weight, a varying counterpoise for said weight connected thereto, said counterpoise comprising a continuous member mounted so as to be moved in conjunction with said superimposed weight, and weight members mounted. on said continuous memher and adapted to exercise a varying counterpoising efiect upon said superimposed weight. I

2. In combination, a breather bag, a su erimposed weight thereon, a continuous )elt mounted on rotatable elements, means attaching said superimposed-weight to said belt to effect simultaneous movements thereof, and weights attached at spaced intervals to said belt for the purpose of exercising a variable countcrpoising effect on said superimposed weight in accordance with its position.

3. In combination, a breather bag, a superimposed wcight, a continuous belt mounted on rotatable members, weights mountedon said belt over a part thereof. flexible means (rm-meeting said superimposed weight to said belt in such a manner that said weights exert a substantial counterpoisiug effect upoh said superimposed weight when the latter is in an elevated position, said weights being adapted to be moved progressively into a position to reduce said counterpoising eife'ct as the superimposed weight descends. l 4. In combination,abreather ha" asuperw imposed weight thereon, a continuous belt,

rotatable means for defining a vertical and horizontal path for said belt, a series of weights on said belt and flexible means connecting said superimposed weight and said belt, so that in the elevated position of the superimposed weight, a substantial number of said weights of the beltare in a vertical position and exercising a substantial counterpoising effect on said superimposed weight and said weights move into the horizontal position of the belt as the superimposed Weight descends.

5. In combination, a breather bag, a superimposed weight thereon, a continuous belt mounted on rotatable elements, and having vertical upwardly and downwardly directed flights, means attaching said superimposed weight to said belt to efiect simultaneous movements thereof, and weights attached at spaced intervals to said belt for the purpose of exercising a variable counterpoising effect on said superimposed weight in accordance with its position.

6. In combination, a breather bag, a superimposed weight, a continuous belt mounted onrotatable members and having vertical upwardly and downwardly directed flights,

:weights mounted on said belt over a part thereof, flexible means connecting said superimposed weight to said belt in such a manner that said wei l' ts exert a substantial counterpoistin'g e cot upon said superimposed weight when the latter is in an elevated position, said weights being adapted to be moved progressively into a position to reduce said counterpoisin effect as the superimposed .weight descen s.

7 In combination, a breather bag, a superimposed weight, a varying counterpoise for said weight connected thereto, said counterpoise' comprising a continuous member mounted so as to be moved in conjunction with said superimposed weight, and weight members mounted on said continuous member in such a manner as to exercise a uniform counterpoising effect on said super- I, im osed weight for a substantial part of the dc ation period and to exercise a gradually decreasing counterpoising effect thereon during the last stage of deflation.

8. In combination, a breather bag, a superimposed weight, a varying countcrpoise for said weight connected thereto, said counterpoise comprising a continuous belt mounted on rotatablemembcrs and connected to said superimposed weight so as to be moved in conjunction therewith. weights mounted on a series of weights mounted on said belt,

said belt, said ball; having a vertical 'fiight" s0 thabweights thereon exercise a counterpoising bfiect on'said superimppsedweiglit, and anbther flight in which weights thereon 5 do notexercise a counterpoising effect .on

' said superimposed weight, -said weights being so arranged on said belt that they exert a substantially constant coun'terpoising efiect when the bag is app oximately onethird or more inflated and a gradually decreasing counterpoising effect as thebag deflats from approximately one-third infiated ,to empty condition.

JOHN E. MOORE. 

